Citation: Jw. Schnetzer et Ms. Tyler, ENDOGENOUS BETA-GALACTOSIDASE ACTIVITY IN THE LARVAL, PUPAL, AND ADULT STAGES OF THE FRUIT-FLY, DROSOPHILA-MELANOGASTER, INDICATES NEED FORCAUTION IN LACZ FUSION-GENE STUDIES, The Biological bulletin, 190(2), 1996, pp. 173-187